How to Download LT Spice Components
As you begin simulating circuits, you may find the LT Spice library to be rather limited. You want to find an exact component online and load it into Spice. This is one way to do it:
Download two files:
Save these files to the desktop, as it is forbidden to save directly to the LT Spice library.
Move ___.sub to c://program files/LTC/LTSpiceIV/lib/sub
Move ___.asy to c://program files/LTC/LTSpiceIV/lib/sym
Restart LT Spice. Your new components should now be available!